| 摘要 |
PROBLEM TO BE SOLVED: To provide a film having both high heat resistance and necking-resistant, high and uniform expansibility. SOLUTION: There is provided an expansible base film comprising a 4-methyl-1-pentene (co)polymer (A) and a thermoplastic elastomer (B), which expansible base film has a content of (B) of 3-50 pts.wt. based on 100 pts.wt. of the total content of (A) and (B) and is characterized in that when it is measured with a differential scanning calorimeter (DSC), the melting point TmB2 ascribable to (B) is 100°C or less or the melting point TmB2 is not observed substantially. COPYRIGHT: (C)2013,JPO&INPIT |
